Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Thu Jan 1 20:07:04 2026 Auto Mode Machine = Linux oleg411-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg411-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 2863 4680 90145 225992 64 8 5480 21262 220606 311842 64 16 10664 55694 866463 512471 64 32 5258 39315 842003 763021 64 64 12608 16855 1310683 1255511 128 4 4902 13830 101357 227699 128 8 5489 11026 370816 331646 128 16 6360 70016 426492 468553 128 32 5170 36644 493989 643108 128 64 9818 132370 434078 1040839 128 128 13504 70025 1231904 466923 256 4 8611 8592 255482 241735 256 8 9196 26879 386682 382685 256 16 22220 35864 382004 285660 256 32 20831 48985 836374 587127 256 64 8042 48046 999940 1398455 256 128 12943 41510 1158540 755195 256 256 12370 102243 699594 1455317 512 4 6341 6046 228679 258055 512 8 11436 16620 238694 246022 512 16 19355 22873 624485 555220 512 32 29054 51451 368615 748563 512 64 23127 25828 165908 275113 512 128 36813 79687 1145443 1040545 512 256 37577 76979 1299295 1299295 512 512 17788 70099 303111 967855 1024 4 5963 11021 97125 96484 1024 8 10243 6040 105403 95097 1024 16 19966 18124 671423 217877 1024 32 23892 49221 803728 720534 1024 64 34081 72326 970437 256510 1024 128 43771 70436 1225101 535011 1024 256 34325 91444 975063 682628 1024 512 50657 118492 1095150 1542286 2048 4 9657 8805 171552 164615 2048 8 15046 17874 274265 192734 2048 16 18340 23276 262972 356609 2048 32 27406 25515 241848 448635 2048 64 29072 38112 1011913 501842 2048 128 24301 39339 1295458 466089 2048 256 27383 47195 1012867 661741 2048 512 43197 76071 827402 869707 4096 4 6509 7031 168372 143734 4096 8 13633 13001 239588 420273 4096 16 15759 25515 373379 290702 4096 32 34349 33165 475451 341474 4096 64 48004 41942 678702 611518 4096 128 30849 52437 580247 468335 4096 256 30188 62466 851002 1012617 4096 512 55029 53365 1995152 800597 8192 4 7716 8072 2456 136709 8192 8 10254 15122 257650 260220 8192 16 16515 21332 383394 245548 8192 32 15521 33225 312731 212123 8192 64 15344 32608 528482 561784 8192 128 27558 39180 855639 584768 8192 256 33250 44280 476029 646007 8192 512 29737 47788 794264 945304 16384 4 6259 7203 162220 91248 16384 8 6078 8729 164694 122171 16384 16 11878 19136 409876 352359 16384 32 18197 26024 517384 485177 16384 64 23443 34334 798322 637484 16384 128 33290 38325 1160257 895195 16384 256 37350 56381 792687 626877 16384 512 37939 55960 786517 737952 32768 4 6817 7486 159448 148233 32768 8 9038 15470 208934 179275 32768 16 17420 21564 311839 320403 32768 32 22378 31084 746489 524128 32768 64 23736 37765 721904 414197 32768 128